notime 
nocheck

makekey X1 #2
makekey X2 $3
makekey X3 $-3

[stave 1 treble 1 key x1]
[octave 1] cdefgabc' | [octave 2] defgabc' |
[key X2]
[octave 1] cdefgabc' | [octave 2] defgabc' |
[key X3]
[octave 1] cdefgabc' | [octave 2] defgabc' |

[endstave]
